Basic Treatment Train Diagrams Keep in mind…variations are ALWAYS possible

Basic Gravity System Components Source Septic tank with effluent screen Drainfield Soil Distribution Box

Shallow placement drainfield Limiting layer Suitable Fill Drainlines and Gravel Aerobic Soil

Areal Fill (“Mound”) drainfield Limiting Layer Suitable Fill Trenches Aerobic Soil

Pressure-dosed gravity Source Septic Tank with effluent screen Drainfield Aerobic Soil Dosing Tank Pressure manifold Pressure regulating valve

Basic LPP System Components Source Septic Tank with Effluent screen LPP Laterals Aerobic Soil Dosing Tank Turn up Manifold Pressure regulating valve

Basic Drip Irrigation System Components (Direct ST Effluent) Source Septic Tank with Effluent screen Drip Laterals and supply and return manifolds Aerobic Soil Dosing Tank Headworks assembly

Basic Drip Irrigation System Components (Advanced-treated effluent) Source Septic Tank with Effluent screen Drip Laterals and supply and return manifolds Aerobic Soil Dosing Tank Headworks assembly Advanced treatment and possible recirculation

Basic sand filter system components To drainfield Observation port Sampling Septic Tank with effluent screen Dosing Tank Underdrain

Type A Peat Filter System Peat Bio-filter Module(s) Fill Mound Septic Tank Dosing Tank Gravel Pad

Type B Peat Filter System (gravity-fed drainfield) Fill Mound Septic Tank Dosing Tank Gravel Pad Peat Bio-filter Module(s) To Drainfield Drop Box (Sampling point)

Type B Peat Filter System (pressure-dosed drainfield) Fill Mound Septic Tank Dosing Tank Gravel Pad Peat Bio-filter Module(s) To Drainfield Pump tank